Configurations Page shows only last bundle and incorrect links

I saw that issue, but didn't mention it as it was closed.

My site is far too mature to add new fields; too much stuff would break. However, this was more a "gasp" moment for me since I can have it do the same in all the content types using that. But it did take me a moment to realize that I was looking at the right field.

AFAIC, a better workaround would be to show all the bundle types on the admin page, not just the most recent one.

I'm not sure what you mean. On the Fields List page, yes, I can see all the entity_types that use the field. However, the HS Configurations page does not. And that is where I went to change the setting for HS.

I've also discovered that the bundle links are incorrect if the entity type is not "node." This code fixes that, and shows each bundle type in which the term is used.

function hs_taxonomy_hierarchical_select_config_info() {
  static $config_info;

  if (!isset($config_info)) {
    $config_info = array();
    $fields = field_info_fields();
    foreach ($fields as $field_name => $field) {
      foreach ($field['bundles'] as $entity_type => $bundles) {
        $bundle_links = array();
        foreach ($bundles as $bundle) {
          $instance = field_info_instance($entity_type, $field_name, $bundle);
          if ($instance['widget']['type'] == 'taxonomy_hs') {
            $bundles_info = field_info_bundles($entity_type);
            switch ($entity_type) {
              case 'node':
                $bundle_links[] = l(t($bundles_info[$bundle]['label']), "admin/structure/types/manage/$bundle");
                break;

              case 'taxonomy_term':
                $bundle_links[] = l(t($bundles_info[$bundle]['label']), "admin/structure/taxonomy/$bundle/fields");
                break;

              case 'profile2':
                $bundle_links[] = l(t($bundles_info[$bundle]['label']), "admin/structure/profiles/manage/$bundle/fields");
                break;
              
              default:
                drupal_set_message(t('What is the correct link for @type', array('@type' => $entity_type)));              
            }
            $entity_info = entity_get_info($entity_type);
            $machine_name = $field['settings']['allowed_values'][0]['vocabulary'];
            $vocabulary = taxonomy_vocabulary_machine_name_load($machine_name);
            $config_id = hs_taxonomy_get_config_id($field_name);
            $config_info[$config_id] = array(
              'config_id'      => $config_id,
              'hierarchy type' => t('Taxonomy'),
              'hierarchy'      => t('Vocabulary') . ': ' . l(t($vocabulary->name), "admin/structure/taxonomy/$vocabulary->machine_name") . '<br /><small>' . t('Field label') . ': ' . $instance['label'] . '<br />' . t('Field machine name') . ': ' . $field_name . '</small>',
              'entity type'    => $entity_info['label'],
//              'bundle'         => l(t($bundles_info[$bundle]['label']), "admin/structure/types/manage/$bundle"),
              'bundle'         => implode('<br />', $bundle_links),
              'context type'   => '',
              'context'        => '',
              'edit link'      => isset($bundles_info[$bundle]['admin']['real path']) ? $bundles_info[$bundle]['admin']['real path'] . "/fields/$field_name/widget-type" : $bundles_info[$bundle]['admin']['path'] . "/fields/$field_name/widget-type",
            );
          }
        }
      }
    }
  }

  return $config_info;
}

I'll see if I can set up a way to actually produce a patch.

This is improved from above code.

BTW, this does not fix the performance issue: The $config_info[$config_id] is built in its entirety for every bundle of the entity type.